The SIGM400 Series Enhanced rifle is designed for use in law enforcement, military operations, the sporting field, and competitive shooting, a true AR platform tactical rifle with unparalleled accuracy. A 16" chrome-lined and phosphate coated barrel provides superior corrosion resistance, and a 7075-T6 aircraft grade aluminum forged lower receiver adds to the durability and reliability that users come to expect from Sig Sauer. The OD green version has a black upper and lower receiver with an OD green polymer Magpul MOE forend, grip, and collapsible stock. This semi-automatic rifle features an A2 post front sight, a flip-up peep rear sight, an adjustable buttstock, a 2-position safety, and a Magpul PMAG 30-round magazine. Its stock, metal, and bore are all in very good condition.